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CHAPTER 6 PORT FUNCTIONS
147
Table 6-5. Port Mode Register and Output Latch Setting when Alternate Function is Used
Pin Name
Alternate Function
PM
××
P
××
Pin Name
Alternate Function
PM
××
P
××
Function
Input/
Function
Input/
Name
Output
Name
Output
P00
INTP0
Input
1 (defined) None
P40 to P47
AD0 to AD7
Input/
×
Note 2
TI0
Input
1 (defined) None
Output
P01 to P03
INTP1 to INTP3 Input
1
×
P50 to P57
A8 to A15
Output
×
Note 2
P04
Note 1
XT1
Input
1 (defined) None
P64
RD
Output
×
Note 2
P10 to P17
Note 1
ANI0 to ANI7
Input
1
×
P65
WR
Output
×
Note 2
P30 to P32
TO0 to TO2
Output
0
0
P66
WAIT
Input
×
Note 2
P33, P34
TI1, TI2
Input
1
×
P67
ASTB
Output
×
Note 2
P35
PCL
Output
0
0
P36
BUZ
Output
0
0
Notes 1. Read data will be undefined if the read instruction is executed for the port when used as alternate function
pin.
2. When pins P40 to P47, P50 to P57 and P64 to P67 are used as alternate function pins, set the functions
with a memory expansion mode register (MM).
Cautions
1.
When external wait is not used in memory expansion mode, P66 pin can be used as an input/
output port.
2.
When Port 2 is used as serial interface pin, input/output and the output latch should be set
according to functions. For setting, refer to Figure 15-5 Serial Operating Mode Register 0
Format, Figure 16-6 Serial Operating Mode Register 0 Format, and Figure 17-3 Serial Operating
Mode Register 1 Format.
Remark
×
: don’t care (no setting required)
PM
××
: Port mode register
P
××
: Port output latch
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